The following table gives the frequency of vowels used in the page of a book.  Vowels a e i o u  Frequency   75   125   80   70   75  As per the given data, which vowels occur less than 80 times?

a, e, i a, i, o, u a, o, u a, e

a, o, u

Vowels occur less than 80 times = a , o , u So , Number of Vowels occur less than 80 times = 3